system exit error when using kd

[dirknbr]

This line generates an error

sense = smkr.Sensemakr(model, treatment='X1', benchmark_covariates=['X2'], kd=[1, 2, 3])

/usr/local/lib/python3.11/dist-packages/sensemakr/sensitivity_statistics.py:177: FutureWarning: Series.__getitem__ treating keys as positions is deprecated. In a future version, integer keys will always be treated as labels (consistent with DataFrame behavior). To access a value by position, use `ser.iloc[pos]`
  return (t_statistic ** 2 / (t_statistic ** 2 + dof))[0]  # extracts float
/usr/local/lib/python3.11/dist-packages/sensemakr/sensitivity_statistics.py:177: FutureWarning: Series.__getitem__ treating keys as positions is deprecated. In a future version, integer keys will always be treated as labels (consistent with DataFrame behavior). To access a value by position, use `ser.iloc[pos]`
  return (t_statistic ** 2 / (t_statistic ** 2 + dof))[0]  # extracts float

An exception has occurred, use %tb to see the full traceback.

SystemExit: Implied bound on r2dz.x >= 1. Impossible kd value. Try a lower kd.

/usr/local/lib/python3.11/dist-packages/IPython/core/interactiveshell.py:3561: UserWarning: To exit: use 'exit', 'quit', or Ctrl-D.
  warn("To exit: use 'exit', 'quit', or Ctrl-D.", stacklevel=1)

[carloscinelli]

The message
"SystemExit: Implied bound on r2dz.x >= 1. Impossible kd value. Try a lower kd."

Is saying that you can't have kd as large as what you used in this example (the confounder is too strong, and your estimates are infinite). You should try a lower kd.